Dina K. Badawy and Dina M. Ibrahim and Alsayed A. Sallam, A Query Optimization Strategy for Autonomous Distributed Database Systems. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. January 2018, vol. 135(3). 141 - 148 [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10008664.